Signal ob alarm bell



G. H. HOAGLAND.

Alarm Bell. No. 17,836. Patented July 21, 185 7.

,llllllllllll I UNITED STATES PATENT OFFICE.

GEO. H. HOAGLAND, OF PORT JERVIS. NEWV YORK.

SIGNAL OR ALARM BELL.

Specification of Letters Patent No. 17,836, dated July 21, 1857.

To all whom it may concern:

Be it known that I, GEORGE H. HOAG- LAND, of Port Jervis, in the county of Orange and State of New York, have invented a new and useful Signal or Alarm Bell; and I hereby declare that the following is a full and exact description.

To enable others to make and use my invention I proceed to describe its construction and operation, reference being had to the drawings hereunto annexed and making part of this specification.

Figure 1, plan of the alarm bell; Fig. 2, side elevation; Fig. 3, section of the reel showin the spiral spring; Fig. 4, section of the ree showing the spring ratchet; Fig. 5, longitudinal section of the reel.

I set the works upon a plain bed late, B, ada ted to be screwed fast over t e head of t e engineer or in any suitable place. The bell is set on the front side of the plate B. A spring, I, holding the hammer, O, is set on one sideof the plate. See Fig. 1. Upon the other or left hand side is set the apparatus for ringin the bell.

The box of the ree is made in two parts, D and E and both secured to the plate.

I The part, D, is a cup, in which is wound a clock spring, (see Fig. 3,) which spring is made fast to the cup, D, at one end and to the reel L, by the othe The part, E,-is a cup in inner periphery of which is cut a ratchet. See Fig. 4.

, The reel, L, is hung in the box, D and E, upon journals. At one end of it is a catch, N, which is a pin set in a hole in one side of the reel having a clock spring at the bottom of it to keep it pressed into the ratchet. Upon the reel box at the end, E, are two cams, H, facing opposite ways. Around the reel is wound several times a strap, F, connected with the signal rope. This reel is so arranged that on pulling the strap, F,

it is unwound, rotating the cams, which strike the spring, I, and ring the bell several times. At the same time the clock spring is wound up to a strong tension. On releasing the strap the spring winds it again upon the reel, the catch N, slipping freely past the ratchet, the end, E, of the reel remaining stationary while the strap is wound upnever turning but in one direction, and that when its cams strike the spring to ring the alarm. The use of the catch in the ratchet is, as will be seen, to move that side of the reel box which bears the cams, and to let the reel slip back without striking the backs of the cams against the spring.

The guide (G,) of the strap is placed a little back of the reel. It consists of a hollow stem in which a pin P is set having a flat head which presses upon the under side of the strap, being held against it by a spiral Epring beneath the pin in the hollow stem,

This construction of an alarm bell enables the conductor to ring rapidly successive strokes with unerring certainty. Any pull upon the rope will strike whether by the hand or by the separation of the cars.

What I claim as my invention and desire to secure by Letters Patent, is

1. The use of the cam reel, D, E, constructed and operated as described, or in any equivalent way for the purpose of striking the bell for a signal or ringing continuously for alarm, substantially as above described.

2. I also claim the combination of the said reel with the hammer and bell for the purposes above set forth.

GEO. H. HOAGLAND.

Witnesses:

OWEN G. WARREN, A. HOAGLAND. 

